User interrace providing information system topology presentation

ABSTRACT

A user interface includes a graphical topological representation of an information system. Information is collected regarding connections between switches, storage nodes and computer nodes in the information system. Any sub networks in the system are identified based on the collected information and classified as LANs or SANs. Connections between the various components are determined, and a layout of any identified LANs, computer nodes, SANs, and storage nodes is established for generating the topological representation in the user interface. The graphical topological representation of the information system is displayed in the user interface with the LAN icons, computer node icons, SAN icons and storage node icons laid out in a matrix-like arrangement of columns and rows, such that for LANs, computer nodes, SANs and/or storage nodes that are connected to each other, the corresponding icons are located on or near a same row in the graphical topological representation.

BACKGROUND OF THE INVENTION

According to recent trends, information technology (IT) systems ofcompanies are becoming ever more large and complex. For example, in somebusinesses, the IT system is no longer just an infrastructure of thebusiness, but needs to act in partnership with the business to increasethe value and competitiveness of the business. Furthermore, the rapidgrowth of IT systems is not limited to very large companies, but evenmid-sized companies can now have hundreds of servers. The rapid growthof server virtualization technology is causing an acceleration of thistrend.

Despite the recent trends of massive growth in data centers and other ITsystems, the administrators of IT organizations are still required toefficiently manage these large and complex IT systems to keep themrunning properly. When a problem occurs, the administrators need torecognize that there is a problem, analyze the problem and then resolvethe issue as soon as possible.

Typically, monitoring the health of an IT system and analyzing anyproblems that may arise is carried out using some form of availabilityand performance management software. This software usually includes theability to discover devices in the IT system and identify theirconnections. This software can be operated remotely from the IT systemthat is the object or target of the management (i.e., the IT system tobe managed may be referred to as the “management target system”), andcan often display the devices discovered in the system on a displayscreen in a graphic or other manner of topological view, therebyproviding an indication or report on the status of the respectivedevices, and possibly also automatically analyzing the cause of anyproblems.

Through use of such management software, administrators are relievedfrom a number of tedious operation tasks that they used to have toperform manually. However, as mentioned above, IT systems themselves aregrowing rapidly, while IT budgets are typically becoming morerestricted. This has resulted in each administrator being responsiblefor managing a very large area of the IT system. Thus, there is a gapemerging between manageability provided by the current managementsoftware and the size of the systems that are required to be managed. Inparticular, the topological views provided by currently-availablesoftware for system monitoring or problem analyzing have become toocomplicated and are able to display only a small portion of the ITsystems on a display screen at any one time. Since the topology of theentire system is information necessary for an administrator to properlycarry out system management for managing availability and performance ofthe information system, there is no currently available solution for usewith large and expandable IT systems.

Related art includes U.S. Pat. No. 7,249,347, to Chang et al.; US Pat.App. Pub. 2007/0094597 to Rostom; US Pat. App. Pub. 2007/0204231 toCunningham et al.; and US Pat. App. Pub. 2007/0156861 to Nedelcu et al.,the entire disclosures of which are incorporated herein by reference.

BRIEF SUMMARY OF THE INVENTION

Exemplary embodiments of the invention provide a user interface toimprove the efficiency of information system availability and improvethe performance of management tasks such as monitoring of systemconditions and analysis of problems within the system. Exemplaryembodiments of the user interface of the invention provide superiordensity of displayed end-to-end topology of information systems bydisplaying components of the information systems in a graphicaltopological list view. These and other features and advantages of thepresent invention will become apparent to those of ordinary skill in theart in view of the following detailed description of the preferredembodiments.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, in conjunction with the general descriptiongiven above, and the detailed description of the preferred embodimentsgiven below, serve to illustrate and explain the principles of thepreferred embodiments of the best mode of the invention presentlycontemplated.

FIG. 1 illustrates an example of a hardware configuration in which themethod, system and programs of the invention may be applied.

FIG. 2 illustrates an example of a logical configuration of theinvention applied to the configuration of FIG. 1.

FIG. 3 illustrates an example of an information system as a managementtarget.

FIG. 4 illustrates an exemplary user interface of the invention withtopology presentation.

FIGS. 5A-5B illustrate exemplary data models and database relations forsystem topology.

FIG. 6 illustrates an exemplary data structure of a network table.

FIG. 7 illustrates an exemplary data structure of a node table.

FIG. 8 illustrates an exemplary data structure of a component table.

FIG. 9 illustrates an exemplary data structure of a connection table.

FIG. 10 illustrates an exemplary process for IP SAN determination.

FIG. 11 illustrates an exemplary process for generating and drawing atopological list display.

FIG. 12 illustrates an exemplary structure of patterns of topologicalconnections.

FIG. 13 illustrates an exemplary data structure of generated and joinedconnection data.

FIG. 14 illustrates exemplary data structures of network and nodeobjects instances and arrays.

FIG. 15 illustrates an exemplary process of object instance generation.

FIGS. 16A-16C illustrate exemplary basics for laying out of objects.

FIGS. 17A-17E illustrate an exemplary process of object layout.

FIGS. 18A-18C illustrate exemplary basics of drawing connection lines.

FIGS. 19A-19C illustrate an exemplary process of connection linedrawing.

FIG. 20 illustrates an exemplary process for laying out and drawing ofswitches.

FIG. 21 illustrates an exemplary second embodiment of a user interfaceincluding topology presentation.

FIG. 22 illustrates an exemplary data structure of a matrix generatedfrom the joined connection data including status indication.

FIG. 23 illustrates an exemplary third embodiment of a user interfaceincluding topology presentation.

FIGS. 24A-24C illustrate exemplary fourth embodiments of a userinterface including topology presentation.

DETAILED DESCRIPTION OF THE INVENTION

In the following detailed description of the invention, reference ismade to the accompanying drawings which form a part of the disclosure,and in which are shown by way of illustration, and not of limitation,specific embodiments by which the invention may be practiced. In thedrawings, like numerals describe substantially similar componentsthroughout the several views. Further, it should be noted that while thedetailed description provides various exemplary embodiments, asdescribed below and as illustrated in the drawings, the presentinvention is not limited to the embodiments described and illustratedherein, but can extend to other embodiments, as would be known or aswould become known to those skilled in the art. Additionally, thedrawings, the foregoing discussion, and following description areexemplary and explanatory only, and are not intended to limit the scopeof the invention in any manner.

Embodiments of the invention, as will be described in greater detailbelow, provide a system, method and computer programs for generating anddisplaying a graphical user interface having a topological systemconfiguration representation for enabling viewing, analysis andmanagement of an information system. Embodiments of the invention areable to display a large number of items of an information system in acompact and efficient manner on a display device, such as a computermonitor, while also keeping the topological configuration information ofthe items intact and displayed for easy comprehension.

According to exemplary embodiments, a method of the invention carriesout discovery of respective devices in an information system that is atarget or object of management (i.e., a management target system). Someembodiments of the invention may automatically determine the existenceof and also the relationships between networks, such as LANs (Local AreaNetworks) or SANs (Storage Area Networks) and any connected nodes (e.g.,servers or storages), and store this information into a database.Additionally, exemplary embodiments of the invention generate end-to-endtopology data of LAN=Server=SAN=Storage mapping by concatenating thenetwork and node relations stored in the database. Under exemplaryembodiments, based on the generated data, networks and nodes may be laidout according to a lattice of columns and rows, and displayed as iconsin the user interface. Further, the relationships between the networksand nodes may be conveyed by displaying connecting lines in the userinterface, thus providing a graphical topological display of the systemin which the topology is also represented in a manner resembling to alattice-like “matrix” or “list” style of display.

In exemplary embodiments, a displayed graphical user interface generatedby the invention is composed of “rows” and “columns”. Columns of theinterface are composed of and represent system layers, and typicallyhave a predefined location in the user interface according to the layerthat each column represents. System layer columns set up in the userinterface may include a backbone network column, a LAN column, acomputer (e.g., server) column, a SAN column and a storage column. Iconsand association or connection lines are aligned according to specificrows and objects for the networks and nodes, such as switches, serversand storages, which correspond to the “cells” of the list. Thus, theicons are laid out according to a lattice created by predefined columnsand a variable number of rows. The number of rows used may be increasedor decreased depending on the number of system component icons that needto be displayed, with the icons for each layer type being listed intheir respective column.

In exemplary embodiments of the invention, by displaying the objectsaccording to a lattice as a “topological list”, wasted or redundantspace is eliminated from the display, and thus more objects of thesystem are able to be displayed at any one time, while still accuratelygraphically representing the system topology. Furthermore, sinceembodiments of the invention incorporate a list style of topologicaldisplay, functions such as sorting or filtering of the items in the ITsystem can be applied to the displayed system. As a result, embodimentsof the invention provide a user interface that improves the efficiencyof management of system availability and the performance, assisting insuch tasks as daily monitoring of the status and health of the ITsystem, performing analysis of any problems that may arise, anddetermining solutions for the problems.

First Embodiments Exemplary Hardware Architecture

FIG. 1 illustrates an example of a hardware architecture in which theinvention may be practiced. The overall system consists of a managementcomputer 100 and a management target system 110 (i.e., an informationsystem that is the object of management). Management computer 100 andmanagement target system may be connected through a local or wide areanetwork (LAN or WAN) 120, or may be otherwise connected for enablingcommunication.

Management computer 100 may be a server or other generic computer thatincludes a CPU 101, a memory and storage 102, a network interface 103,one or more input devices 104, which may include a keyboard, mouse, andthe like, and a display 105, which may be a monitor or the like.Management computer 100 is typically a computer terminal used by thesystem administrator for managing the management target system 110.Management target system 110 is an information system composed ofnetwork switches making up one or more networks, and also includingservers and storage systems/devices which are targets or objects to bemanaged by the system administrator from the management computer 100.Exemplary details of the management target system 110 are describedbelow, such as with reference to FIG. 3.

Logical Element Structures on the Management Computer

FIG. 2 illustrates exemplary embodiments of software and logical elementstructures that may be provided on the management computer. The modulesand the data structures of the invention may be stored in memory/storage102 or other computer readable medium, either in management computer100, in a portable medium, or in another location. A discovery module201 is configured to discover devices included within the managementtarget system, such as switches, servers and other computers, andstorage systems, arrays, and the like. An information collecting module210 collects various types of information from the devices discovered bythe discovery module, such as configuration information, connectionsbetween the devices, status and performance metrics and so on.

The collected data collected by information collecting module 210 isstored in database 230. Database 230 holds the collected data and anumber of tables used for presenting the topological list view of theinvention. A network table 500 holds information about identified LANsand SANs, as discussed below with reference to FIG. 6. A node table 600holds identified nodes, such as switches, servers and storages, asdiscussed below with reference to FIG. 7. A component table 700maintains relationships between networks and associated switches, asdiscussed below with reference to FIG. 8. A connection table 800 holdsrelationships between networks and connected nodes, as discussed belowwith reference to FIG. 9.

Topology presentation module 220 is software and/or hardware thatgenerates end-to-end topology data from collected data and displays thegenerated topology data as a graphical topological list view, asdiscussed below with reference to FIG. 4. Topology presentation module220 creates working data when creating and presenting the topology. Theworking data created and used includes joined connection data 1300,which may be represented as a matrix, table, or two-dimensional array,and which is a collection of the end-to-end topologies of the entiremanagement target system that is generated based on the connectioninformation stored in the database 230. LAN object array 1419, SANobject array 1429, server object array 1439 and storage object array1449 hold respective network and node information extracted from thedatabase 230 during creation and presentation of the topological listview, as described below with respect to FIG. 14.

Monitoring module 202 collects and maintains data on events that mayoccur in the management target system 110. For example, monitoringmodule 202 may maintain an event list of events sent from devices in themanagement target system 110, such as whether a particular server,storage or switch is operating correctly or not. Further, root causeanalysis module 203 automatically determines the critical points of themanagement target system based on events observed. Reporting module 204provides a variety of on-demand or periodical reports of system healthstatus of the target management system 110. These modules serve asgeneral components of the management software for providing systemavailability and performance management of the management target system.

Management Target System Structure

FIG. 3 illustrates one possible example of a system structure of aninformation system 110 that might be managed by the management computer100. While the particular information illustrated in FIG. 3 is used todescribe the invention, it should be understood that information systemshaving a limitless variety of configurations by be managed using theinvention, and that the invention is not limited to any particularconfiguration of a management target system. For example, while theinvention is described in the environment of Internet Protocol (IP) andFibre Channel (FC) protocols, other suitable protocols might also oralternatively be used. Embodiments of the invention disclose anexemplary user interface to display a topology of a management targetsystem, and also a methodology of how to represent the topology frominformation which is collected from nodes and other items within themanagement target system.

As illustrated in FIG. 3, management target system 110 may be composedof backbone networks 310, LANs 330, servers or other computers 340, SANs350, and storages 370. Each individual switch, computer or storage mightalso be referred to a “node” in the management target system 110. Abackbone network 310 is a network that includes the IP network structureitself, and which is composed of IP switches only, instead of havingservers connected to it. For example, in FIG. 3, switches 320-1 and320-2 are included in the backbone network because they only connect toother switches and are not connected to any of servers 340-1 through340-10.

LANs 330 are sub-networks in the information system that include the IPswitches 330 connected to servers 340 for carrying out communicationsand the like. For example, LAN 330-1 is composed of IP switches 320-2,320-3 and 320-4, with servers 340-1 to 340-6 being connected to theseswitches 320-2, 320-3 and 320-4 (and thereby belonging to the LAN330-1). Similarly LAN 330-2 is composed of IP switches 320-5 and 320-6,with servers 340-7 to 340-10 being connected to these switches 330-5 and330-6. Thus, the LANs 330 and backbone network 310 may be communicationnetworks used by servers 340 for communication, such as with clientcomputers, or the like. Servers 340 may connected to SANs for enablingstorage and retrieval of data used in the communications and for therunning of any applications the might be in operation on servers 340.Further, while servers 340 are referred to as “servers” herein as atypical use case for computer nodes in a in information system, itshould be understood that servers 340 may also be other types ofcomputers, and the invention is not limited to computers having aspecific function of acting as a server to a client. Thus, the termserver is used interchangeably with the terms computer and computer nodethroughout the description, and it should be understood that this termis not intended to limit the invention to apply to computers that actonly as servers, but instead, “server” can mean any type of computernode that performs a processing function.

SANs 350 are the storage area networks that sub networks in theinformation system that connect servers 340 with storages 370. In theillustrated embodiment of FIG. 3, SAN 350-1 is an IP SAN which composedof IP Switches 320-7 and 320-8. For example Network Attached Storage(NAS) or iSCSI (IP Small Computer System Interface) type of storages mayconnect to this type of SAN. Servers 340-1 to 340-7 are connected to SAN350-1. Additionally, SAN 350-2 is a FC SAN which includes a FC Switch360. Fibre channel type of storages, such as those having highperformance FC disk drives may connect to this type of SAN. In theillustrated embodiment, servers 340-8, 340-9 and 340-10 are connected toSAN 350-2. Thus, storages 370 may be of the types able to communicateusing IP or FC networks. Storage 370-1, for example, may be a storagesystem having a controller or NAS head and a plurality of disk drives ofthe SATA type or other suitable type, while storage 370-2 may be astorage system having a controller and a plurality of FC disks drives.Other types of storage systems may also be used with the invention, andthe invention is not limited to any particular storage types.

User Interface with Topology Presentation (Topological List View)

FIG. 4 illustrates an example of a graphical user interface 150providing a topological list view, which includes representation of thetopology of the information system described above with reference toFIG. 3 in a manner that improves over the interfaces available in theprior art. The topology graphically shows the relationships betweenfunctional components or objects that are linked together in theinformation system. The user interface illustrated in FIG. 4 sets forththe topology of the target management system from the backbone networkall the way through to the respective storage devices by utilizing nodeand network icons for representing objects in the system, and byrepresenting connections between those objects using straight or steppedconnector lines. In preferred embodiments, the user interface of theinvention is able to represent system objects in a fashion similar to a“matrix” or “list” style of representation, while also maintaining agraphical representation showing connections that is easily grasped bythe user. This is accomplished by laying out the topology according to alattice having a variable number of rows of predetermined height and apredefined number of columns corresponding to each of the different typeof elements to be represented (i.e., backbone network, LANs, computernodes, SANs and storage nodes).

In the illustrated embodiment, user interface 150 includes fivepredefined columns representing five classes or layers of theinformation system. These columns comprise a backbone network column411, a LAN column 412, a computer (or server) column 413, a SAN column414 and a storage column 415. The order of the columns set forth inthese embodiments, and in particular having the LAN=Computer=SAN=storagecolumns displayed adjacent to each other in the order shown enablegeneration of a very dense topological view of the system. Thus, eachfunctional object in the management target system may be classified intoone of the columns 411-415 of user interface 150, and identified asbelonging to its respective layer of the management target system.Further, connection lines are created between objects located in thepredefined columns and are aligned by specific “rows”. Objects of themanagement target system, such as switches 320, 360, servers 340, andstorages 370 are represented in corresponding cells or icons in theinterface in a list-like manner by laying them out in their respectivecolumns. By showing system objects as a list in this manner, theinvention eliminates having redundant and wasted space on the screen,and thus is able to show more objects at once, while still alsorepresenting the physical system topology.

Backbone network column 411 contains IP switch icons 420-1, 420-2representing switches 320-1, 320-2, respectively, which compose thebackbone network 310. Each switch icon 420 preferably is represented bya rectangular cell, and may include an alphanumeric switch identifier421 for the switch, such as “ipsw1” in the case of switch 420-1. In theillustrated example of FIG. 4, switch node icons 420 of the backbonenetwork column 411 are listed simply in a single list and not presentedaccording to a network structure, even if, for example, the backboneswitches have a nested network relationship, or the like. This isbecause the structure of the backbone network itself typically is not soessential for the availability and performance management tasks carriedout with respect to the management target system 110. Thus, it is notnecessary to show lines connecting the backbone switch icons 420 to theswitch icons 420 in the LAN column 412. However, in alternativeembodiments, switch icons 420 can be presented along with respectivenetwork rectangles and connecting lines as well, similar to thearrangement in the LAN column 412 discussed below.

LAN column 412 vertically presents all sub networks (i.e., LANs) definedin the management target system 110 that are not defined as SANs. Thesesub networks typically have some servers or other computers connected tothem, but in some embodiments may also have storages connected, and aretypically used for communications between the servers, communicationswith client computers outside the management target system,communications with management computer 100, or the like. The method ofdefining these sub networks and determining whether a particular subnetwork in the information system is a LAN or a SAN is set forth below.

Each LAN icon 430 may include a rectangular cell having a networkaddress identifier 431, and contains switch icons 420 of the IP switches320 that comprise the particular sub network. For example, LAN icon430-1 contains switch icons 420-2 to 420-4, which represent IP switches320-2 to 320-4, respectively, thereby representing LAN 330-1 of FIG. 3.Similarly, LAN icon 430-2 contains switch icons 420-5, 420-6, whichrepresent IP switches 320-5, 320-6, respectively, thereby representingLAN 330-2 of FIG. 3. Each LAN object icon 430 may show a network address431 or other alphanumeric identifier as its identifier or name. Also, itshould be noted that IP switch 320-2, which is given the identifier“ipsw2” makes up part of the backbone network 310 and also part of LAN330-1, as illustrated in FIG. 3, and is represented in user interface150 by switch icon 420-2 in both backbone column 411 and LAN column 412.

The height of each of the LAN icons 430 in the user interface 150 (andSAN icons 450 discussed below) is determined at least in part by thenumber of servers and storages connected to the particular sub network,and the number of corresponding icons represented for each of these, asis discussed further below. Defining a corresponding height for each LANicon 430 makes it easier for an administrator or other user of interface150 to recognize the association between a particular sub network andthe corresponding servers and storages that are connected to the subnetwork using left-to-right horizontal viewing techniques without havingto adjust the display vertically.

Computer column 413 presents computer node (server) icons 440vertically. Each computer node icon 440 preferably is represented by arectangular cell, and may include an alphanumeric computer identifier441 for the computer, such as “srv1” in the case of computer node icon440-1. Computer node icons 440 are, to the extent possible, listedadjacent to the LAN icon 430 of the particular LAN to which thecomputers are connected. For example, computer node icons 440-1 through440-6 represent servers 340-1 through 340-6, respectively which areconnected to LAN 330-1, as illustrated in FIG. 3. Thus, as illustratedin FIG. 4, computer icons 440-1 through 440-6 are connected to LAN icon430-1, which represents LAN 330-1. Similarly, computer node icons 440-7through 440-10, which represent servers 340-7 through 340-10, areconnected LAN icon 430-2, which represents LAN 330-2.

SAN column 414 contains SAN object icons 450, representing all IP or FCSANs in management target system 110. SANs may be defined as networkswhich connect computers 340 with storage nodes 370, or storage nodes 370with each other. Similar to the LAN object icons 430 for sub networksdescribed above, each SAN object icon 450 may be represented by arectangular cell having an alphanumeric SAN identifier 451 near the topof the rectangle for identifying a network address. The rectangular cellof the SAN icon 450 may also have a defined height in the display of theuser interface 150 which corresponds to the number of connected computeror storage nodes. Each SAN icon 450 contains IP switch icons 420 or FCswitch icons 460. For example, SAN icon 450-1 contains IP switch icons420-7 and 420-8, which correspond to switches 320-7 and 320-8 making upSAN 350-1 of FIG. 3. Similarly, SAN icon 450-2 contains FC switch icon460 which corresponds to FC switch 360, which makes up SAN 350-2 of FIG.3. Each FC switch icon 460 may be represented by a rectangular cellhaving an alphanumeric FC switch identifier 461.

Storage column 415 contains storage node icons 470, presenting avertical representation of the storage nodes in the information system.Each storage node icon 470 preferably is represented by a rectangularcell, and may include an alphanumeric storage identifier 471 for theparticular storage node, such as “strg1” in the case of storage icon470-1. In the illustrated example, storage icon 470-1, which representsto storage 370-1, is connected to SAN icon 450-1, which represents SAN350-1, thereby representing the relationship set forth in FIG. 3.Similarly, storage icon 470-2 is connected to SAN icon 450-2, therebyrepresenting the relationship of FIG. 3 in which storage 370-2 isconnected to SAN 350-2.

Connections between sub networks (e.g., LANs, SANs) and nodes (e.g.,servers, storages) are represented in user interface 150 by horizontalconnecting lines 490 and stepped connecting lines 491. Since the networkobject icons 430, 450 (i.e., the rectangular cells) are drawn with aheight defined to correspond with the number of connected server nodeicons and/or storage node icons, there is enough space to clearly drawrespective connection lines 490, 491. This reduces errors on the part ofusers of the interface 150, which might arise from mistaken associationsresulting from misinterpreting densely drawn lines. Four types ofconnections drawn in the illustrated embodiment are (a) LAN to computer;(b) computer to SAN; (c) SAN to storage; and (d) LAN to storage. In thisembodiment, a direct connection between a computer node and a storagenode (i.e., not through a SAN) is not shown in the user interface 150,and instead a storage node that is directly connected to a computer nodeis treated the same as if the storage node were internal disks in thecomputer node. However, in other embodiments, a direct connectionbetween a computer node and a storage node can also be shown on userinterface 150.

Additional information may be shown on each icon for the network icons,node icons or even on the connection lines. For example, additionalinformation provided by each icon to aid in availability management andperformance management can include health status of the nodes,configuration information, such as OS type, redundancy of theconnection, and so on. The additional information can be retrieved fromthe system by the information collecting module 210 and monitoringmodule 202. Thus, each switch icon 420, 460, network icon 430, 450,computer icon 440, storage icon 470 or connection line may include astatus indicator, such as status indicators 480 that indicates thestatus of the particular piece or pieces of equipment represented by theicon, or the like. For example, when the associated equipment isfunctioning properly, the status indicator 480 may show a check markand/or may be colored green, or the like. When the equipment is notfunctioning properly, the status indicator may change color or shape,for example, as illustrated by status indicator 480 of computer icon440-4, in which the status indicator has changed color, such as to red,and shows an “X” instead of a check. The status indicators 480 may alsoinclude a warning level, such as turning yellow, or the like, when apiece of equipment is functioning close to a critical level, but has notyet failed. Other information may also be associated with particularicons in the user interface, with the illustrated embodiment of FIG. 4being only one of a number of possible embodiments.

The user interface 150 of the invention, an example of one embodiment ofwhich is illustrated in FIG. 4, provides representation of the systemtopology in what is referred to herein as a “topological list view”.Such a characterization is appropriate because, while the topology ofthe invention is graphically represented for easy comprehension ofconnection relationships in the system, the representation of thetopology also resembles a list or matrix of the components in theinformation system because the components are laid out according to alattice of rows and columns. The user interface is arranged under theinvention so that the frontend components all the way through to thebackend components can all be viewed on a computer display 105 withoutadjusting the display horizontally. In particular, the five columns,namely, the backbone column 411, LAN column 412, computer column 413,SAN column 414 and storage column 415 all fit legibly on a standard sizecomputer display for easy viewing without having to use a horizontalscroll bar. Additionally, a conventional vertical scroll bar 495 may beincluded on the right side of the interface, and/or up/down arrowbuttons 494 such as in the tray at the bottom of the interface may beprovided with the user interface to enable the user to move thedisplayed topology up and down in the vertical direction should someportions of the topology not be visible in the display area of the userinterface.

Data Structures and Processes for Generating the User Interface

Embodiments of the invention generate and display a novel user interfacethat includes a graphical topology representation arranged in alist-like manner. The data structures and processes for generating anddisplaying the user interface are described next.

Management Target Device Discovery and Models Used

Discovery of each switch, computer and storage device within managementtarget system 110 may be carried out initially for creating the topologyrepresentation. A number of techniques are known in the prior art forcollecting information of devices contained within an informationsystem, with one example being set forth by Chang et al. in U.S. Pat.No. 7,249,347, which was incorporated herein by reference. Accordingly,details of the steps carried out by discovery module 201 do not need tobe described in further detail.

After devices contained in the management target system 110 arediscovered by discovery module 201, a list of the devices discovered maybe generated, which represents all the devices in the management targetsystem that will be subject to management using the user interfacegenerated under the invention. Information collecting module 210 thencollects information from each of the respective devices so as todetermine all the connections between networks 310, 330, 350, such asLANs and SANs, and the nodes 340, 370, such as servers and storages.Information collecting module 210 then stores the collected connectioninformation and the collected device information in a usable form bygenerating tables 500, 600, 700 and 800 of database 230. Therelationships and data structures of each table are discussed furtherbelow with respect to FIGS. 5-9.

FIGS. 5A-5B illustrate examples of a data model and DB tablerelationships for storing data related to the system topology of themanagement target system. After discovering switches and nodes, andcollecting information from devices in the system, the topology of themanagement target system is resolved and stored in the DB 230 using themodels illustrated in FIGS. 5A-5B.

FIG. 5A illustrates the relationships between network table 500, nodetable 600 and component table 700 for identifying and determiningrelationships between the switches and the networks in the managementtarget system. Network table 500 stores information on network objectssuch whether a particular sub network is classified as a LAN or SAN.Node table 600 contains information on node objects, which in this modelof FIG. 5A correspond to switches. Component table 700 storesinformation that represents mapping between the networks the switchesthat are included within each network.

FIG. 5B illustrates the relationships between network table 500, nodetable 600 and connection table 800 for identifying and determiningrelationships between the computers and storage nodes and the networksin the management target system. The network and connected server andstorage model includes tables that describe the networks and theinterconnections with the server and storage nodes. Network table 500stores information on network objects such whether a network isclassified as a LAN or SAN. Node Table 600 stores information of thenode objects, which in this model correspond to computers or storages.Connection table 800 stores information regarding mapping between thenetworks and the connected computers or storages.

Network Table

FIG. 6 illustrates an example of a data structure of a network table500. Network table 500 holds the records for both LANs and SANs in themanagement target system 110. Network table 500 includes a network IDentry 510, which is an internal ID to identify the network; a networkname entry 520, which is a description to be shown on the screen in theuser interface for identifying the network; a network type entry 530,which specifies whether the particular network is an IP or FC network;and a display type entry 540, which specifies whether the network isclassified under the invention as a LAN or SAN. For example, an IP subnetwork might be used as either a LAN or an IP SAN. In the exampleillustrated in FIG. 6, line 591 represents a record of a network whichhaving an ID 510 of “Net1” and an IP address “10.10.33.0” as its name520. Network “Net1” is an “IP” network type and is classified as a“LAN”. Line 592 lists a network named “Net2”, similar “Net1”, but with adifferent IP address as its name 520. Line 593 also lists an “IP”network, similar to lines 591-592, but this network is used as a “SAN”instead of LAN. Further, line 594 lists a record for a “FC” networkrather than an IP network.

Node Table

FIG. 7 illustrates an example of a data structure of node table 600.Node table 600 maintains information regarding switch nodes 320, 350,computer nodes 340 and storage nodes 370. Node table 600 includes a nodeID entry 610 that shows an internal identifier used to identify thenode; a name entry 620, which provides a description to be shown in theuser interface 150 to identify the node; and a node type entry 630,which specifies whether the node is a switch, a computer (e.g., server)or a storage node. For example, line 691 shows a record of a “Switch”node which has “Node1” as the node internal ID 610 and “ipsw1” for thenode name 620. Similarly, line 692 is a record for a “Server” node andline 693 is a record for a “Storage” node.

Component Table

FIG. 8 illustrates an example of a data structure of a component table700. Component table 700 represents the composition of the switcheswithin a network. Component table 700 includes an component ID entry710, which provides an internal identifier used for identification ofthe component; a network ID entry 720, which provides a the ID thenetwork which corresponds to the node are involved, and a node ID 730,which identifies the corresponding node that is involved. For instance,line 791 represents a record of a component which has “Cmp1” as the IDand shows that a node identified as “Node1” is a component in thenetwork having the network ID of “Net1”. Similarly, line 792 is a recordfor a component “Cmp2” that shows a node identified as “Node4” is also acomponent in the network “Net1”. Line 793 is a record for a component“Cmp3” that shows a node identified as “Node10” is a component ofnetwork “Net2”. Thus, the component table associates identified subnetworks of the network table 500 with the nodes identified in nodetable 600 that are included in the identified network.

Connection Table

FIG. 9 illustrates an example data structure of connection table 800.Connection table 800 represents the connections between networks andserver and storage nodes. Connection table 800 includes a connection IDentry 810 that is used as internal identification of the connection; anetwork ID entry 820, that identifies a network that a correspondingnode is connected to; a node ID entry 830, that identifies the Node thatis connected to the network; and a connection number 840, that shows thenumber of connections between the network and the node. For example,line 891 is a record of a connection which has “Cnct1” as the connectionID and which shows that a node having a node ID “Node5” is connected tothe network “Net1”. If the connection has redundancy, this can berepresented in the connection number 840 column. In some embodiments,for example, redundancy in a connection may be shown as a pop up dialogthat appears on the screen when the corresponding association line isselected by the administrator.

Node Information Collection and Node Connection Determination

As discussed above, the information collecting module 210 collectsinformation from respective devices in the management target system, anddetermines the connections between networks and nodes. The informationcollecting module stores the collected information in the database 230and generates tables 500-800. Since information collecting module 210has a list of devices that were discovered by the discovery module 201and identified as being present in the management target system 110, theinformation collecting module 210 is able to obtain various conditionsand attributes from each device in the system, such as network addressrelated information, for example, IP address, MAC (Media Access Control)address, HBA (Host Bus Adapter) WWN (World Wide Name), port WWN, and thelike. The information collection can be carried out using standardinterfaces, such as WMI (Windows Management Instrumentation), SNMP(Simple Network Management Protocol), SMI-S (Storage ManagementInitiative—Specification), or vendor-proprietary interfaces for specificdevices. Furthermore the information collecting module can use SSH(Secure Shell) to logon to the servers in the system to obtaininformation from the servers.

After collecting network-related information from respective nodes theinformation collecting module 210 determines whether the sub networks inthe system and the nodes making up the sub networks should be classifiedas LANs or SANs based on the collected information. In some embodiments,for example, certain switches are identified as being part of separatesub networks (i.e., as making up separate LANs) when they have separatesubnet addresses. For example, in FIG. 3, LAN 330-1 has a subnet addressof 10.10.33.0, while LAN 330-2 has a subnet address of 10.20.33.0. Othermethods for classifying switches within particular LANs may also beused. Initially, an IP network may be classified as a LAN and an FCnetwork may be classified as a SAN. Then, the information collectingmodule 210 checks whether any of the IP networks that are classified asLANS are actually used as IP SANs.

FIG. 10 illustrates an example of a process for determining whether anIP network should be classified as a LAN or an IP SAN. The basic ruleused here is to classify an IP network as a SAN if a storage device isconnected and every connected server has another LAN connected on theother side.

Step 1000: As described above, every identified IP network is initiallyclassified as a LAN based on the information collected from the nodes inthe management target system.

Step 1010: The process selects a LAN from the list to determine whetherthe LAN should be reclassified as a SAN. When every LAN identified inthe system has already been checked, the process ends.

Step 1020: According to the information gathered from storage nodes 370,the process checks whether any storage devices are connected to theselected LAN currently being evaluated. If one or more storage nodes areconnected to the LAN, then the process goes to step 1030; otherwise, theprocess goes back to step 1010 to select the next LAN for examination.

Step 1030: According to the information gathered from computer nodes inthe management target system, the process determines the identity of anycomputer nodes 340 that are connected to the LAN being evaluated.

Step 1040: The process selects a computer node identified in step 1030.If every computer node has already been examined, then that means thatevery server examined is also connected to another LAN, and the LANcurrently being evaluated can be classified as a SAN, so the processgoes to step 1060; otherwise, if all the computer nodes identified instep 1030 have not yet been examined, the process goes to step 1050.

Step 1050: If the computer node selected in step 1040 has a connectionto another LAN in addition to the connection to the LAN being evaluated,then the process goes back to step 1040 to examine the next computernode. On the other hand, when a server being examined is found to beconnected only to the selected LAN being examined, then the LAN beingexamined can be assumed to act as a LAN (i.e., a communications network)instead of a SAN, so there is no need to examine the remaining computernodes, the LAN remains classified as a LAN, and the process goes to step1010 to select the next LAN for evaluation.

Step 1060: When every computer node connected to the LAN being evaluatedis determined to be connected to another LAN as well, then the IPnetwork selected in step 1010 is classified as a SAN, and the processgoes back to step 1010 to check next LAN. In addition, to betterfacilitate the classification of an IP network in the management targetsystem as a LAN or SAN, a user interface can be provided to enable anadministrator to directly classify the usage of an IP network as eithera SAN or a LAN.

Through the method described thus far, the nodes and networks in themanagement target system are identified, and the connection types andnetwork types are determined. Information collecting module 210 thenstores this information into the database 230. Based on the informationobtained from servers, switches and storages in the management targetsystem, the information collecting module creates new records on thenode table 600, and stores the information. Also, based on theidentified LAN/SAN network information collecting module 210 creates newrecords on the network table 50 using the collected and determinedinformation. Furthermore, information collecting module creates newrecords on the component table 700 based on which network the switches320, 350 belong to, and creates new records on the connection table 800based on which network each computer 340 or storage 370 belongs to.

After the discovery and data collection process has been completed, theentire topology information of the management target system has beenstored in the database 230. When the administrator triggers a requestfor displaying a topological list view on the display 105, topologypresentation module 220 is able to extract the object and connectioninformation from the database 230 and use the extracted information togenerate the user interface 150 having a topological list view of themanagement target system based on the information extracted from thedatabase.

Process of Topological List View Generation

Steps for generating and displaying the topological list view in a userinterface based on the system topology information stored in thedatabase are set forth below. These processes are carried out by thetopology presentation module, as described below. FIG. 11 illustratesthe overall process performed to generate the user interface having atopological list view.

Step 1100: The topology presentation module 220 sends a query to thedatabase 230 to extract the network and node connection information andto construct temporary data referred to as joined connection data 1300.This is the data from which the connections from LAN-to-computernode-to-SAN-to-storage node are concatenated, and the entire end-to-endtopology of all the connections in the system can be joined in a singletable or matrix, as illustrated in FIG. 13. Also, rows of data may becreated and sorted during this step to control the order of thecomponents to be drawn on the screen.

Step 1110: The process reads the joined connection data 1300 row by row,and generates object (LAN/Server/SAN/Storage) instances on the memory.At the same time, the process counts how many of the node objects areconnected to respective network objects. This can then be used todetermine the height of the network objects to be drawn in thetopological list view.

Step 1120: The process lays out network and node objects from top tobottom of the displayed interface. During the laying out of objects oneach row the topology presentation module 220 places networks and theirconnected nodes in a topological list view, such as the configurationillustrated in FIG. 4, to enable viewing in a horizontal fashion insteadof placing objects too densely for easy viewing.

Step 1130: The process generates the connection lines between networksand their connected nodes.

Step 1140: The process lays out the switches that are in the backbonenetwork(s), LAN(s) and SAN(s).

Generate Joined Connection Data

In this example, switches in the backbone network(s) are drawnindependently from other topology at the end of the entire process.Therefore the topology of LAN=Server=SAN=Storage is generated first.

Under these embodiments, there are eight possible basic topology typesthat might be drawn for the four basic layers in the information system,as set forth below.

-   -   1. LAN=Server=SAN=Storage are all connected from end-to-end.    -   2. No LAN connection, but only Server=SAN=Storage.    -   3. No Storage connection, but only LAN=Server=SAN.    -   4. LAN=Server connection.    -   5. Server=SAN connection.    -   6. SAN=Storage connection.    -   7. LAN=Storage connection.    -   8. Server=Storage connection.

FIG. 12 illustrates these eight topology connection types in a matrixfashion. Topology pattern table 1200 includes a type entry 1210, a LANcolumn 1220, a server column 1230, a SAN column 1240 and a storagecolumn 1250. Thus, it may be seen that lines 1291-1298 correspond to theeight possible topology connection cases 1-8, respectively, discussedabove. By making a query to the database 230 to extract every connectionthat matches with the types set forth above and joining every connectioninto a single matrix, the process is able generate end-to-end connectiondata for the four basic layers in the information system, that then maybe joined and represented in matrix or other form, and that holds everytopology configuration in the system that needs to be drawn on thetopological list view in the user interface. The generated temporarydata is referred to herein as the joined connection data 1300, which maybe represented in a matrix, table, array or the like, as illustrated inthe matrix set forth in FIG. 13 containing exemplary entries based onthe exemplary management target system illustrated in FIG. 3.

A query sent to the database 230 for generating the joined connectiondata 1300 is composed of queries that request the respective eightconnection types described above. For example, collecting of connectiontype #4 records (i.e., LAN=Server connection type) can be carried out byselecting the information according to the following search query:

-   -   Table:Network.NetworkID=Table:Connection.NetworkID and    -   Table:Node.NodeID=Table:Connection.NodeID and    -   Table:Network.DisplayType=‘LAN’ and    -   Table:Node.NodeType=‘Server’,        in which “Table:Network”, “Table:Node”, and “Table:Connection”        correspond to the network table 500, node table 600 and        connection table 800, respectively, describe above with respect        FIGS. 6, 7, and 9, respectively, and the various entries        therein.

Obtaining the results using the above formula according to the format of[LAN, Server, SAN, Storage] as described with respect to FIG. 12, forthe query for LAN=Server connections generate records filled with [(LANName), (Server Name), NULL, NULL] values (i.e., an empty space receivesa “NULL” entry in the respective column). Thus, by sending respectivequeries in the same manner as described above to collect every type ofconnection of the seven connection types described above, a complete setof records can be obtained. On the query statement those records areconcatenated by “UNION” (e.g., Query to collect type #1 connection)UNION (Query to collect type #2 connection) UNION . . . (Query tocollect type #8 connection). During the query, execution result recordswill be sorted in alphabetical and numerical order. By performing such asort at this stage, the same network objects are set forth in sequence,which makes them easier to layout in one location and also makes iteasier for a user to read and locate desired items. The sorting can bedone left-to-right by prioritizing the left-side column which is sortedby LAN name first, then the server name, then the SAN name, and lastlyby storage name. “NULL” entries are handled as low priority during thesort.

FIG. 13 illustrates an example of connection data which is generated andjoined into a matrix to create joined connection data 1300. Records arefilled with actual LAN, server, SAN, and storage names according to thetypes of connections. Thus, the end-to-end connections of all of thecomponents of each layer (LANs, computer nodes, SANs, and storage nodes)in the system are able to be listed in the joined connection data 1300.Empty spaces are filled with NULL values. For example, lines 1391 arematched for a connection type #1. For instance, the first record showsthat LAN “10.10.33.0” has server “srv1” connected, and server “srv1” isalso connected to SAN “192.168.11.0”, which has storage “strg1”connected to it. On the other hand, lines 1395 are matched forconnection type #6, with the last record showing that storage “strg11”is connected to SAN “Fabric-5”, but that no connection to the servers orLANs are currently found to exist. Additionally, it should be noted thatas a practical matter connection types #3 (LAN=Server=SAN) and #5(Server=SAN) may not exist in some embodiments, since a SAN would notnormally be expected to exist without a storage attached. Also, asdiscussed above, connect type #8 (Server=Storage) is not displayed onthe user interface in the described embodiments because this connectiontype is treated as if the connected storage is the same as internalstorage for the particular computer node. Processes described below usethe joined connection data 1300 for generating respective topologyrepresentations on the memory of the management computer and for drawingand displaying the objects and connection lines on the display 105 forgenerating the user interface with topological list view 150.

Generating Object Instances

The topology presentation module may generate network or node objectinstances on the memory 102 by reading record-by-record sequentiallystarting from the top of the matrix created from the joined connectiondata 1300. An objective of this process is to create object instancesand count the number of nodes (i.e., servers and storages) that areconnected to respective networks (i.e., LANs and SANs).

FIG. 14 illustrates an example of data structures of network and nodeobjects while temporarily stored on the memory 102. Furthermore everyobject instance may be stored as an array variable in a respectivearray, such as in a LAN object array 1419 for the instances for LANobjects 1410, a SAN object array 1429 for instances of SAN objects 1420,a server object array for instances of server objects 1430, and astorage object array 1449 for instances of storage objects 1440.

Each LAN object instance 1410 includes a Name 1411, which is thedescription to be shown on the user interface to identify the network; aStartRowNumber 1411, which is a row number where the LAN object willstart to be drawn; and ConnectedNodes 1412, which is an array type ofvariable that lists either server object name or storage object namethat is connected to this LAN object 1410. The order appended to thisarray will be referred to when drawing the server objects and/or storageobjects. LAN object 1410 also includes a LayoutStatus 1413, whichindicates whether the LAN Object is laid out or relocated, and which hasthree types of status, namely, “Initialized”, “Laid Out” and “Fixed”.“Initialized” indicates that an object has not yet been laid out; “LaidOut” indicates that an object has been laid out, but is still eligibleto be relocated for optimizing the layout; while “Fixed” indicates thatthe object has been laid out and should not be relocated duringoptimization.

Each SAN object instance 1420 includes a Name 1421, which is adescription to be shown in the user interface to identify the network; aStartRowNumber 1422, which is the row number where the SAN object willstart to be drawn; ConnectedServers 1423, which is an array type ofvariable that lists server object names of servers which are connectedto this SAN, with the order appended to this array being used forestablishing the order of drawing the servers; ConnectedStorages 1424,which is an array type variable that lists storage object names ofstorages which are connected to this SAN; and LayoutStatus 1423, whichindicates whether the SAN object has been laid out or relocated.

Each server object instance 1430 includes a Name 1431, which is adescription to be shown in the user interface to identify the server; aRowNumber 1431, which is a row number where the server object will bedrawn; a LayoutStatus 1433, which indicates whether the server objecthas laid out or relocated; a LeftSideOffset 1434, which is the offsetvalue used when plural connection lines are drawn to different LANs fromthis server; and a RightSideOffset 1435, which is an offset value usedwhen plural connection lines are drawn to a different SAN from thisserver. The offsets are explained further below with respect to thedrawing description.

Each storage Object 1440 includes a Name 1441, which is a description tobe shown in the user interface to identify the storage; a RowNumber1441, which is the row number where the Storage Object will be drawn; aLayoutStatus 1443, which indicates whether the Storage Object has beenlaid out or relocated; and a LeftSideOffset 1444, which is the offsetvalue used when plural connection lines are drawn to different LANs orSANs from this storage object.

FIG. 15 illustrates an example of a process for carrying out objectinstance generation. The expression “LAN.ConnectedNodes” used in FIG. 15refers to the array variable named ConnectedNodes 1413 of the LAN objectinstance 1410. Similarly, the expressions “SAN.ConnectedServers” and“SAN.ConnectedStorages” refer to the array variables ConnectedServers1424 and ConnectedStorages 1424, respectively, of the SAN objectinstance 1420.

Step 1500: The process selects a record from the joined connection data.For example, the joined connection data 1300 may be organized as asorted matrix or table, as illustrated in FIG. 13 and as discussedabove, and the records may be selected by starting with the first recordat the top and proceeding sequentially in order toward the bottom. Whenevery record has been processed, the process ends; otherwise the processgoes to step 1505.

Step 1505: For the selected record, if the process finds LANinformation, SAN information, server information or storage information,then the process goes to step 1510. After processing all foundinformation in the record, the process goes to step 1520.

Step 1510: The process checks whether or not the found LAN, SAN, serveror storage information has already been created as an object instance.If an object instance has already been created for the particular LAN,SAN, server or storage information, the process goes back to step 1505for processing the next information, or else goes to step 1515 when anobject instance does not already exist.

Step 1515: When an object instance does not already exist, the processcreates a new object instance (as described above with respect to FIG.14) for the respective LAN, SAN, server or storage information beingprocessed. To carry this out, the process sets the Name 1411, 1421, 1431or 1441, respectively, in the object instance and appends the createdobject instance to the array variable.

Step 1520: When the selected record selected in step 1500 has serverinformation and it is a new server instance (i.e., a server objectinstance was created in step 1515), then the process also determineswhether the server is connected to a LAN (i.e., a LAN is also found inthe record). If so, the process goes to step 1525; otherwise the processgoes to step 1530.

Step 1525: The process appends the Name of the new server objectinstance to the ConnectedNodes array 1413 of the LAN instance found inthe record.

Step 1530: When the selected record selected in step 1500 has serverinformation and it is a new server instance (i.e., a server objectinstance was created in step 1515), then the process also determineswhether the server is connected to a SAN (i.e., a SAN is also found inthe record). If so, the process goes to step 1535; otherwise the processgoes to step 1540.

Step 1535: The process appends the Name of the new server objectinstance to the ConnectedServers array 1423 of the SAN instance found inthe record.

Step 1540: When the selected record selected in step 1500 has storageinformation and it is a new storage instance (i.e., a storage objectinstance was created in step 1515), then the process also determineswhether the storage is connected to a LAN (i.e., a LAN is also found inthe record). If so, the process goes to step 1545; otherwise the processgoes to step 1550.

Step 1545: The process appends the Name of new storage object instanceto the ConnectedNodes array 1413 of the LAN instance found in therecord.

Step 1550: When the selected record selected in step 1500 has storageinformation and it is a new storage instance (i.e., a storage objectinstance was created in step 1515), then the process also determineswhether the storage is connected to a SAN (i.e., a SAN is also found inthe record). If so, the process goes to step 1555; otherwise the processgoes back to step 1500.

Step 1555: The process appends the Name of the new storage objectinstance to the ConnectedStorages array 1424 of the SAN instance foundin the record.

Laying Out and Drawing Objects

FIGS. 16A-16C illustrate basic rules of object layout and drawing forpreferred embodiments of the invention. In the illustrated embodiment,row position of each object in the user interface 150 may be determinedbased on the sequential order, as determined from the object instancegeneration of FIG. 15 and the sorted joined connection data, as in thesorted joined connection data 1300 illustrated in FIG. 13. Thus, objecticons for the nodes or networks can basically be drawn sequentially fromtop to bottom of their respective columns 411, 412, 413, 414, 415. Foreach column 411, 412, 413, 414, 415, a row position pointer may bemaintained as the pointer which indicates the row position of a rowwhere the next object will be drawn. As illustrated in FIG. 16A, forexample, there are a plurality of rows 1615 of a uniform height underthe computer column 412. A row position pointer 1640 indicates the nextrow 1615 in which an object icon may be drawn in this column.“RowPosition” is used as the name of a variable for the respective rowposition pointer in the descriptions of the processes set forth below.

Additionally, layout optimization is necessary to ensure that the iconsfor each object are efficiently laid out for display in the userinterface 150 to increase density and minimize wasted space in thedisplay, while still clearly and legibly showing the associationrelationships and connections between the objects in the managementtarget system. Layout optimization processing of the topology maypreferably be carried out during row-by-row placement of the objects.For example, after initially placing objects on the latest row, theprocess is able to carry out optimization of the layout. For instance,the process checks whether any stepped lines can be realigned to createstraight lines by moving the connected object icon downward one or morerows. This realignment is carried out because it is a premise of theinvention that straight line connections between networks and nodes arethe best type of representation for enabling a user to quickly grasp thecorrespondence between various objects in the topology, while alsominimizing wasted space in the interface.

Movement of objects is typically only carried out by downward movementof one or more objects, as illustrated in FIG. 16B. Before movement ofan object is carried out, the process checks that no other objects areplaced below the object already. However, movement of objects downwardmultiple times can cause too much open or wasted space in the displayeduser interface 150, which actually makes viewing of the system topologymore difficult for the user. Therefore movement for optimization andrealignment is limited under these embodiments to once for each object,after which the LayoutStatus of the object is set to “Fixed”. Forexample, in FIG. 16B, server object icon 440, before optimization, wasconnected to LAN 430 by a stepped line, as shown at 1611. Afteroptimization, server 440 is moved downward, and connected with LANobject icon 430 with a straight line 1612.

FIG. 16C illustrates how embodiments of the invention use a lattice offixed columns and a variable number of rows 1615 for laying out objecticons so that connected icons are placed on the same row when possiblefor straight line connection to provide a more dense topologicaldisplay. Thus, the icons 430, 440, 450 and 470 representing objects ofdifferent layers (LANs, computer nodes, SANs and storage nodes,respectively) that are connected to each other are aligned on the samerow(s) 1615, so that their connections may be more easily viewed byhorizontal viewing in the user interface, without having to scroll theuser interface vertically. The topology of the laid out icons of theuser interface 150 is in accordance with the end-to-end connectionsidentified in the joined connection data 1300, and therefore enableslayout of the icons in a matrix-like arrangement. In the illustratedembodiments, the height of the rows corresponds to the height ofcomputer node icons and the storage node icons. As discussed above, theheight of the LAN icons and SAN icons correspond to the number ofconnected computer and/or server nodes. For example, as illustrated inFIG. 16C, LAN icon 430 a has a height that corresponds to an integermultiple of the row height, and has three server nodes 440 a, 440 b, 440c laid out on corresponding rows on which LAN icon 430 a is laid out.Row position pointers 1620, 1630, 1640, 1650 and 1670 are provided foreach of the layer type columns 411, 412, 413, 414 and 415, respectively,for keeping track of the next available row 1615 at which a respectiveicon may be placed.

As also illustrated in FIG. 16C, a particular case for optimizationoccurs when a LAN is connected to a storage without a SAN, asillustrated in FIG. 16C. When a connection is from a LAN icon to astorage icon, the layout needs to be handled a little differently thanin the other cases, since the connection line crosses both the computercolumn 413 and the SAN column 414. Assume that objects connected tofirst LAN icon 430 a, including server icons 440 a, 440 b, 440 c, a SANicon 450 a and storage icons 470 a, 470 b have been laid out, asillustrated. Next, the situation may be encountered in which the nextLAN 430 b that is laid out is connected to storage 470 c withoutconnection to a server or a SAN. When this happens, LAN 430 b connectedto storage 470 c needs to be laid out below the lower of either thelowest server 440 c or lowest SAN object 450 a. LAN row position pointer1630 is also moved to next row in LAN column 412 available for placementof the next LAN 430 c. Row position pointer 1650 for SAN column 414 alsoneeds to be moved to the same row in case there is a next SAN 450 b tobe laid out. Then the storage object icon 470 c or a server object 440 dis placed in the row below the row of the lowest server or SAN object,as illustrated in FIG. 16C. By following this rule of movement, enoughvertical separation is maintained to enable drawing of a connection line1614 from LAN 430 b to storage 470 c in storage column 415, asillustrated. It should be noted however, that while connection line 1614is shown for illustration purposes, the determination and generation ofconnection lines is not performed at this stage in these embodiments,but instead is made later, as discussed below. Also, the layout ofswitch icons, such as backbone switches and switches in the LANs, SANSis carried out later, as discussed below. Further, the storage rowposition pointer 1670 for the storage column 415 is moved below thelatest storage object 470 c, and also below any server object 440 d orSAN object that might be drawn in between the LAN column 412 and thestorage column 415. Similarly, the computer row position pointer 1640for the computer column is moved to the next row below the most recentlydrawn server 440 d.

Thus, it may be seen that laying out and drawing of objects for the userinterface of the invention includes obtaining a record from the joinedconnection data 1300, and laying the object out according to thepredetermined columns and next available row for each column, asillustrated in FIG. 16C. Initial layout is performed sequentiallyaccording to the joined connection data 1300, and the layout isoptimized as each object is laid out, such as illustrated in FIG. 16B.Any LAN=Storage connection types are laid out as discussed above withreference to FIG. 16C.

FIGS. 17A-17E illustrate an example of a process performed by thetopology presentation module 220 for object layout generation forcarrying out the object layout discussed above.

Step 1700: The process initializes the row position variables 1620,1630, 1640, 1650, 1670.

Step 1710: The process selects a record from the joined connection data1300 in sequential order. After every record in the joined connectiondata has been processed, the process goes to step 2100 (FIG. 17E) tocarry out object drawing.

Step 1720: The process determines which objects exist in the selectedrecord (e.g., LAN, server, SAN and/or storage).

Step 1730: The process gets corresponding instances from respectivearray variables.

Step 1740: If the connection type is LAN=Storage, the process proceedsto step 1900 (in FIG. 17C); otherwise the process goes to step 1750.

Step 1750: If a LAN exists and its LayoutStatus 1414 is “Initialized”(i.e., it has not been laid out yet), then the process goes to step 1760to layout the LAN; otherwise, if the particular LAN has already beenlaid out, the process goes to step 1810 (in FIG. 17B).

Step 1760: The process sets the start position of the LANLAN.StartRowNumber as LANRowPosition determined from row positionpointer variable 1630 in the LAN column 412.

Step 1770: The process counts the number of nodes (i.e., severs orstorages) connected to the LAN.

Step 1780: The process adds the count to LANRowPosition to determine therow that will be next to the end of the LAN currently being laid out.

Step 1790: The process sets the LAN.LayoutStatus from “Initialized” to“Laid Out”.

Step 1810: If a SAN exists in the record currently being processed, andthe SAN LayoutStatus 1425 is set as “Initialized” then the process goesto step 1811; otherwise the process goes to step 1820.

Step 1811: The process sets the start position of the SANSAN.StartRowNumber as SANRowPosition which is currently pointed to bySAN row position pointer 1650.

Step 1812: The process counts the number of both storage nodes andserver nodes connected to the SAN.

Step 1813: The process adds the larger of the two counts toSANRowPosition.

Step 1814: The process sets SAN.LayoutStatus from “Initialized” to “LaidOut”.

Step 1820: If a server node exists and its LayoutStatus is “Initialized”then the process goes to step 1821; otherwise, the process goes to step1827.

Step 1821: The process sets the position of the serverServer.StartRowNumber as ServerRowPosition which is the row currentlypointed to by server row position pointer 1640.

Step 1822: The process increments ServerRowPosition by incrementing theserver row position pointer 1640.

Step 1823: The process sets Server.LayoutStatus from “Initialized” to“Laid Out”.

Step 1827: If server and LAN exist in the record, and that LAN also hasdirect connection to a storage node, then the process goes to step 1828;otherwise the process goes step 1830.

Step 1828: The process just increments StorageRowPosition byincrementing the storage row position pointer 1870 (i.e., theStorageRowPosition and ServerRowPosition will be incrementedsimultaneously during the layout of Server and Storage objects connectedto a LAN which has a direct storage connection.)

Step 1829: The process increments ServerRowPosition if ServerRowPositionwas not incremented in step 1822 above, such as in a situation in whichthe server instance already has “Laid Out” or “Fixed” in theLayoutStatus 1433.

Step 1830: If a storage node exists in the record and its LayoutStatus1443 is “Initialized”, then the process goes to step 1831; otherwise,the process goes to step 2000 in FIG. 17D.

Step 1831: The process sets the position of the storageStorage.StartRowNumber as StorageRowPosition, which is the row currentlypointed to by server row position pointed 1670.

Step 1832: The process increments StorageRowPosition by incrementing thestorage row position pointer 1670 to the next row.

Step 1833: The process sets the Storage.LayoutStatus from “Initialized”to “Laid Out”.

FIG. 17C, steps 1900 through 1990, set forth the handling of thesituation when there is a LAN connected directly to a storage without anintervening connection to a server or SAN, as the process is redirectedfrom step 1740 in FIG. 17A.

Step 1900: If LAN.LayouStatus is “Initialized” (not laid out yet) then,the process goes to step 1930; otherwise the process goes to step 1910.

Step 1910: The process checks whether LAN.ConnectedNodes has anotherstorage instance which has already been laid out. If such anotherstorage instance exists, then the process goes to step 1920 (i.e., theprocess leaves the LAN object as currently placed); otherwise theprocess goes to step 1930.

Step 1920: The process sets Storage.RowNumber as the currentStorageRowPosition corresponding to the current storage row positionpointer 1670, and increments both StorageRowPosition andServerRowPosition by incrementing the respective pointers 1640, 1670.

Step 1930: The process set the start position of the LAN as the positionof the lower one of the server (ServerRowPosition) or SAN(SANRowPosition).

Step 1940: The process counts the server and storage nodes connected tothe LAN.

Step 1950: The process adds the count to the LANRowPosition (i.e.,increments the LAN row position pointer to the next row that will followthe end of the LAN object).

Step 1960: The process sets the LAN.LayoutStatus as “Fixed” (i.e., itwill not be relocated after this process is complete).

Step 1970: The process sets the SANRowPosition to the same row as theLANRowPosition.

Step 1980: The process sets the Storage.RowNumber to be LAN startposition, and also sets StorageRowPosition and ServerRowPosition to thenext row by incrementing the respective row position pointers 1670,1640.

Step 1990: The process set Storage.LayoutStatus as “Laid Out”.

FIG. 17D sets forth the steps carried out for optimization of the laidout elements, as set forth in steps 2000 through 2065.

Step 2000: If a LAN=Server connection type exists, the process goes tostep 2005.

Step 2005: The process counts the number of server and storage nodesconnected to the LAN.

Step 2010: The process checks whether the server object row number isbetween the start and end row of the LAN. If the server object is in arow that is between the start row and the end row of the LAN, theposition does not need to be changed, and the process goes to step 2060;otherwise, if the server object is out of this range, the process goesto step 2015.

Step 2015: The process compares the locations to determine whether theserver or LAN object is in the upper position (i.e., starts at anearlier row).

Step 2020: If the LAN object is in the upper position then the processchecks that the LayoutStatus 1414 is not set as “Fixed” and that the LANobject is currently placed in the lower-most position of all the LANobjects already laid out.

Step 2024: The process finds the position (Nth) of the server objectstored in LAN.ConnectedNodes, and sets the found number to the variableN. For example, if the LAN icon was determined to have a height equal tofive rows because the number of connected nodes is five, and the serverobject is the third node to be connected, then the variable N is equalto “3” in this example.

Step 2025: The process calculates a value “v_Diff” which is equal to thedifference from server row position to the Nth row of the LAN.

Step 2030: The process adds the value “v_Diff” to LAN.StartRowNumber andLANRowPosition which results in the LAN object being moved lower anumber of rows equal to the amount of “v_Diff”.

Step 2035: The process sets the LAN.LayoutStatus as “Fixed”.

Step 2040: On the other hand, if the server is in the upper position,then the process checks that its LayoutStatus is not “Fixed” and thatthe object is currently placed in the lower-most position serversalready laid out.

Step 2045: The process calculates the value “v_Diff”, which is thedifference between the start positions of the LAN object and the serverobject.

Step 2050: The process adds the value “v_Diff” to Server.RowNumber andServerRowPosition, which results in the server object being moved lowera number of rows equal to the amount of “v_Diff”.

Step 2055: The process set Server.LayoutStatus as “Fixed”, i.e., theserver will not be moved again in further optimization.

Step 2060: The process carries out optimization between the server andthe SAN, if any, using the same process of steps 2000 through 2055, asset forth above with respect to the connection between the LAN and theserver. If the server LayoutStatus 1433 has been set to “Fixed”, asdiscussed above, then the server object will not be moved duringoptimization.

Step 2065: When the LAN=server optimization and server=SAN optimizationare complete, the process checks for a SAN=storage connection for thisinstance. If a SAN=storage connection exists, the optimization processis carried out using the same steps 2000 through 2055 as described abovewith respect to LAN=server connection layout optimization. If the SANLayoutStatus 1425 has been set to “Fixed”, then the SAN object will notbe moved during optimization.

FIG. 17E sets forth steps 2100 through 2170 which carry out the actualdrawing of the objects in the user interface, i.e., display generation.

Step 2100: The process selects a LAN object instance 1410 from the LANobject array 1419. If there are no LAN object instances, or if all theLAN instances have already been drawn, the process goes to step 2120.

Step 2110: The process draws a rectangle (i.e., a rectangular cell) forthe selected LAN object instance at the StartRowNumber 1412, with theheight of the rectangle being determined based on the number ofconnected nodes (from ConnectedNodes 1413). The process also adds theName 1411 of the LAN.

Step 2120: When all the LAN instances have been drawn, the processselects a SAN object instance 1420 from the SAN object array.

Step 2130: The process draws the rectangle (i.e., a rectangular cell)for the selected SAN at the StartRowNumber 1422 with the height of therectangle being determined based on the larger number of the number ofConnectedServers 1423 and the number of ConnectedStorages 1424. Theprocess also adds the Name 1421 of the SAN.

Step 2140: When all the SAN instances have been drawn, the processselect a server object instance 1430 from the server object array.

Step 2150: The process draws a rectangle (i.e., a rectangular cell) atRowNumber 1432 indicated in the server object instance. The process alsoadds the Name 1431 of the server to the rectangle.

Step 2160: When all the server objects have been drawn, the processselects a storage object instance 1440 from the storage object array.

Step 2170: The process draws a rectangle (i.e., a rectangular cell) atthe RowNumber 1442 specified in the storage object instance 1440. Theprocess also adds the Name 1441 of the storage object instance to therectangle. Additionally, it should be noted that lay out and drawing ofthe switch icons into the user interface 150 is performed in theseembodiments after drawing of connection lines, as discussed below, butcould alternatively take place sooner.

Drawing Connection Lines

After each object of the management target system has been drawn for usein generating a display, the connection lines may be drawn next. FIGS.18A-18C illustrate some basic rules used for drawing the connectionlines in these embodiments. Coordinates, such as “(x, y)” coordinatesmay be used to designate the start and end points of connection lines,as well as mid points in the case of stepped lines. FIG. 18A illustratesa basic straight connection line 2210 between two objects 2221, 2222.For example, the “x” axis coordinates “X1” and “X2” represent twodifferent “x” axis locations for the edges of the respective objects2221, 2222, while the “y” axis coordinates are the same “Y1” for boththe beginning and end point of the line. When only one line is to beconnected to an edge of an object, the “y” coordinate may be located atthe center of the object. However, when multiple lines are connected toone or both of the objects, the “y” coordinate may be offset up or down,and the corresponding “y” coordinate at the connected object is offsetthe same amount as well, so as to keep the line horizontal.

Similarly, as illustrated in FIG. 18B, (x, y) coordinates may be used todefine a stepped line 2220 between two objects 2223, 2224 which are notin line with each other, such as when they exist on different rows.Stepped line 2220 is drawn using four sets of (x, y) coordinates,namely, (X1, Y1), (X2, Y1), (X2, Y2) and (X3, Y2) to define the line. Inthese embodiments, the invention limits all connecting lines to eitherstraight lines or stepped lines to enable easier comprehension by a userviewing the user interface 150.

Upper and lower direction grids can be used, as illustrated in FIG. 18Cwhen drawing stepped lines between objects which have different heights.For example, topology presentation module 220 uses an upper directiongrid 2235 and a lower direction grid 2236 to maintain a predetermineddistance between multiple stepped lines. Stepped lines 2230 that connectfrom left to right in an upward direction a laid out using upperdirection grid 2235, while stepped lines 2240 that connect from left toright in a downward direction are laid out using lower direction grid2236. As illustrated, upper direction grid 2235 and lower direction grid2236 are laterally offset from each other so that the vertical portionsof the lines do not overlap even when a large number of connection linesmust be drawn.

FIGS. 19A-19C illustrate an example of a process of drawing connectionlines in these embodiments of the invention. The steps to drawconnection lines are basically (1) draw lines between LAN andserver/storage nodes; (2) draw lines between server nodes and SANs; (3)draw lines between SAN and storage nodes. Lay out and drawing of switchicons for generating the user interface 150 is performed after drawingthe connection lines in these embodiments, as discussed below.

Drawing Lines between LAN and Server/Storage Nodes

Step 2300: The process initializes the coordinate “X1” as being theright side edge of the LAN object rectangle.

Step 2310: The process selects a LAN instance from the LAN array 1419.

Step 2320: The process sets the row variable “R1” equal to the LAN startposition.

Step 2330: The process initializes grid position variables (to use inthis LAN), as illustrated in FIG. 18C. For example, the upper directiongrid 2235 may be initialized to the left most position, and the lowerdirection grid 2236 will be initialized to right-most position (i.e.,the position on the direction grids to be used first if a stepped lineis drawn).

Step 2340: The process selects a node, either a server node or a storagenode, from LAN.ConnectedNodes array 1413 for the LAN object instance1410 currently being processed.

Step 2350: The process finds corresponding server node instances 1430 orstorage node instances 1440 by the name from server array 1439 orstorage array 1449, respectively.

Step 2360: The process sets row variable “R2” equal to the RowNumber1432 or 1442 of a found node instance.

Step 2370: If R1 (Nth portion of LAN) and R2 (server/storage node) areon same row (R1=R2), then the process goes to step 2400 in FIG. 19B;otherwise, the process goes to step 2500 in FIG. 19C.

Step 2380: After drawing the line in the process of FIG. 19B or 19C, theprocess increments R1 and check for the next node objects.

FIG. 19B is directed to the case in which a straight line is to bedrawn, i.e., R1=R2 in step 2370.

Step 2400: The process sets coordinate “X2” as being the left side edgeof the server or storage node object obtained in step 2350.

Step 2410: The process gets the LeftSideOffset value 1434 or 1444 of theserver or storage node instance, respectively, and then increments thisvalue by one in the instance.

Step 2420: The process sets coordinate “Y1” equal to the defaultposition of row R1 plus the offset value LeftSideOffset obtained in step2410.

Step 2430: The process draws a straight line from (X1, Y1) to (X2, Y1),and then the process goes back to step 2380 in FIG. 19A.

FIG. 19C is directed to the case in which a stepped line is to be drawn,i.e., R1≠R2 in step 2370.

Step 2500: The process sets coordinate “Y1” equal to the defaultposition of row “R1”.

Step 2510: The process sets coordinate “X2” equal to the “grid” value,which is the value of the x axis for determining where the vertical partof the stepped line will be drawn. Each node may have its own grid valueif needed and thus, the grid value may be one of UpperGridForServer,LowerGridForServer, UpperGridForStorage or LowerGridForStorage, based onfound instance (server or storage) in step 2350 and whether the node ison a row higher or lower than R1. If the upper direction is used, thenthe respective grid value is increased by one; otherwise, if the lowerdirection is used, the respective grid value is decreased by one.

Step 2520: The process gets the LeftSideOffset value 1434 or 1444 of theserver node instance 1430 or storage node instance 1440, respectively,and then increments the LeftSideOffset value.

Step 2530: The process sets coordinate “Y2” equal to the defaultposition of row “R2” plus the offset value obtained in step 2520.

Step 2540: The process sets coordinate “X3” equal to the left side edgeof the node object rectangle.

Step 2550: The process draws the stepped line by drawing three lines(X1, Y1) to (X2, Y1), (X2, Y1) to (X2, Y2) and (X2, Y2) to (X3, Y2).Following drawing of the stepped line, the process goes back to step2380 in FIG. 19A.

Drawing Lines between Server and SAN

Steps for drawing connection lines between computer node and SAN objectsare almost same as illustrated in FIGS. 19A-19C. Of course, SAN instancedata is used instead of LAN instance data. Further, the row variables“R1” and “R2” are switched in usage due to the fact that the positionsof the SAN icons are on the opposite side of the server icons.

Drawing Lines Between SAN and Storage

Steps for drawing connection lines between SAN objects and storage nodeobjects is almost the same as illustrated in FIGS. 19A-19C, except thatSAN instance data is used instead of LAN instance data, and only storageobject instances need be considered.

Layout and Draw Switches

In these embodiments, as one example, switches in the backbone networksare simply listed in the backbone network column 411, without havingnetwork structure representation drawn in. Thus, in the embodimentsillustrated, connection lines are not made to individual switch icons.Instead, as illustrated in FIG. 4, the switch icons are 420, 460 arejust listed in their respective network locations. For example, switchicons 420-1, 420-2, corresponding to the backbone, are listed inbackbone column 411 with no connection lines to them. Similarly, switchicons 420-2, 420-3, 420-4 are listed in the rectangle of LAN icon 430-1,with no connection lines connected to the switch icons 420-2, 420-3,420-4. Instead, the connection lines connect only to the rectangle ofthe LAN icon. This method for displaying connections reduces the numberof connecting lines to be displayed, thereby making the topologicaldisplay less confusing and easier to comprehend. In other embodiments,however, the connections between each of the switches may also bepresented in the user interface when providing the topological listview. After drawing the LAN, server, SAN and storage objects, and theconnection lines between these objects, the topology presentation moduledraws all switch icons on the network icons already drawn. FIG. 26illustrates an example of a process for drawing switch icons. Datarequired to draw the switch icons is obtained from the database 230.

Step 2600: The process selects a record from network table 500 of thedatabase 230.

Step 2610: The process obtains the name 520 and display type 540, and ifthe display type 540 is a LAN, then the process goes to step 2620.

Step 2620: The process selects all switch nodes by relating the networktable 500 with the component table 700 and the node table 600.

Step 2630: The process checks whether the LAN has any server or storagenodes connected. If no server or storage nodes are connected, and onlyswitches are involved, the LAN can be determined to be a backbonenetwork, and the process goes to step 2640.

Step 2640: The process adds the found switches (which are classified asbelonging to the backbone network) to an array variable“v_BackboneSwitches”, and the process goes back to step 2600.

Step 2650: The process finds the corresponding LAN instance from the LANobject array 1419, and obtains the StartRowNumber 1412 from the LANobject instance.

Step 2660: The process draws all switches selected in step 2620 in theLAN icon corresponding to the selected LAN object instance.

Step 2670: If the selected record selected from the network table instep 2600 is for a SAN instead of a LAN, then steps 2620-2660 arecarried out for the selected SAN, by replacing “LAN” with “SAN” in eachof the steps.

Step 2680: After drawing all the switches in the LAN and SAN icons, theprocess draws switches which have been classified as belonging to thebackbone network in the backbone network column 411.

Drawing of the switches will generally complete the display of the userinterface providing topology presentation. At this point, the user,typically an administrator is able to use a mouse or other interface toclick on the various icons in the system to view additional informationregarding the equipment represented by the icons. Furthermore, shouldthe administrator feel that a switch icon, for example, is located inthe wrong location, such as being located in a LAN instead of a SAN, orin the backbone instead of in a LAN, the invention may includeprovisions to enable the administrator to manually move an icon from onlocation to another.

Second Embodiments

In the first embodiments set forth above, the scope encompassesgenerating a topological representation of the entire system. However,since the invention uses a topological layout that also resembles a listor matrix based upon a lattice of rows and columns, the graphical userinterface of the invention is compliant to having list-orientedfunctions applied to it, such as sorting of rows, filtering of items, orthe like. The second embodiments described below set forth examples ofmethods for adopting sorting or filtering criteria, which may bespecified by an administrator. Most of the components and behaviors aresame as described above with respect to the first embodiments, and thus,the differences are described below.

As discussed in the first embodiments, the topology of the systemdisplayed on the user interface with topological list view depends onwhat and how the connection information was listed on the joinedconnection data. After the connection data has been generated andprocessed to contain a desired content and order, the layout processlays out and draws those connections. Therefore, by adding sorting orfiltering criteria to a query for generating the joined connection data1300, or by performing a sort or filter on the result of the query,sorting or filtering of the topology can be carried out, and then onlythe sorted or filtered results are laid out and displayed.

User Interface with Topological List View and Sorting/Filtering

FIG. 21 illustrates an example of a topological list view which is ableto specify sorting or filtering criteria for controlling the portion ofthe management target system topology displayed by the user interface2150. Criteria may be specified in various ways, but in this example asort criteria dropdown list 2710 and a filter criteria dropdown list2720 are provided on the display 105 with the user interface 2150. Anadministrator is able to use the dropdown lists 2710, 2720 to choosedesired sorting or filtering criteria by selecting from the respectivedropdown lists 2710, 2720. Possible sorting or filtering criteria caninclude status of nodes, date of patch that has been applied, CPUworkloads, OS or vendor type, user group, or even user-defined criteria.

Additionally or alternatively, a tree list 2730 can be used as anotherway of specifying a particular scope of topological display of themanagement target system or certain devices in the system. For instance,in one embodiment, selecting one of the user group folders in the treelist 2730, such as a folder named “ERP” is an operation carried out by auser for specifying filtering criteria of the topological list viewpresented in user interface 2150.

Additionally or alternatively, checkboxes 2740 may be added to the userinterface, such as one check box 2740 per column, to enable anadministrator to specify which column should have first priority onsorting rows. For example, in FIG. 21, computer column 413 has beenchecked, and thus, this column will be give first priority when sortingthe entire connections of the management target system. In this example,when sorting by the status of the devices, the computers (servers) aresorted by their status types first, and then the other devices aresorted, which can enable an administrator to focus on finding andlisting critical situations in the servers.

FIG. 22 illustrates an example of data of a matrix of the joinedconnection data 2800 generated in this embodiment. Joined connectiondata 2800 includes columns for LAN name 2810, server name 2830, SAN name2850, and storage name 2870, similar to joined connection data 1300discussed above with respect to FIG. 13. In addition, in theseembodiments, joined connection data 2800 also includes a LAN statuscolumn 2820, a server status column 2840, a SAN status column 2860, anda storage status column 2880. In these embodiments, it may be assumedthat the information collecting module 210 is configured to periodicallycollect the health status from the devices in the management system andstore the collected health status information in the database 230.Sorting or filtering can be performed when sending the query to createthe joined connection data 2800, or the sorting or filtering may becarried out after obtaining the results of the query by the topologypresentation module.

In the example illustrated in FIG. 22, the administrator has specifiedsorting according to status by clicking on “status” on drop down menu2710, and has also specified that the computer column 413 has firstpriority by checking box 2740 for computer column 413, as illustrated inFIG. 21. Therefore, the servers that are in the most critical condition(such as overloaded or not functioning properly) are listed at the topof the list and the corresponding topology will be represented in thisorder when the topology presentation module performs lay out and drawingof the topology of the management target system on the display 105. Forexample, as illustrated in FIG. 22, servers “srv30” and “srv4” have astatus of “critical”, while server “srv1” has a status of “warning”, andis listed after the critical status servers, while the remaining serversare listed as “ok”. When the topology of the system is generated in theuser interface 2150, the order of the system objects in the displayedtopology will conform to the order set forth in the sorted joinedconnection data 2800.

Third Embodiments

FIG. 23 illustrates another alternative embodiment of the user interfacewith topology presentation 4150 of the invention. In the embodimentillustrated in FIG. 23, there are four predefined columns instead offive, namely, LAN column 412, computer column 413, SAN column 414 andstorage column 415. Backbone column 411 of the prior embodiments hasbeen eliminated from this embodiment. The switches of the backbonenetwork can either not be included in the topology display, or may bedisplayed in their own LAN rectangle at the bottom of the LAN column,which may have a name 431 of “Backbone” or the like. The lay out anddrawing of the icons, connection lines and the other elements of theuser interface 4150 illustrated in FIG. 23 may be carried out in themanner as discussed above for the previous embodiments. Otheralternative embodiments will also be evident to those of skill in theart in light of the disclosure given herein.

Fourth Embodiments

The examples discussed above in the first through third embodiments aredirected to user interfaces of the invention for presenting atopological representation for managing hardware components in the ITsystem, such as switches, computers and storage devices. Howeverembodiments of the invention, including the topological list view, canalso be applied to generating and displaying a topologicalrepresentation for managing not only physical components, but alsological components in the information system. Such logical componentsmay include, for example, an executable software program instance suchas database server instance, logically/virtually constructed elements,such as logical volumes created from storage capacity of hard diskdrives (HDDs), virtual machines generated on a hypervisor running on acomputer, and so on. There are logical associations that exist betweenthese logical components that may be represented in graphicaltopological display of the invention. For example, logical associationsthat may be displayed using embodiments of the invention include therelationship between web=application=database server in a webthree-tiered system; the relationship between virtual machines and ahypervisor which the virtual machines are running on; or associationsbetween a logical volume and the RAID group that the volume is createdfrom. Therefore, the topology of these components and the logicalassociations between the components can be displayed on the userinterface that is described in this invention.

Also, as described in the previous embodiments, connection informationbetween hardware devices can be collected via existing means such asWMI, SNMP, SMI-S and so on. In a similar manner, logical associations,such as those discussed above can be obtained via proprietary orstandard interfaces. For instance, the relationships between thehypervisor and virtual machines can be obtained from the managementsoftware of the virtual machines. Similarly, the relationships betweenlogical volumes and RAID groups can be obtained from storage managementsoftware or an embedded module on the storage device itself. Suchcollected information of logical components and their logicalassociations is stored in the database 230 illustrated in FIG. 2. Thecollected information can be retrieved by using a query sent fromtopology presentation module 220, in the same manner as described in theprior embodiments. Furthermore, in the previous embodiments, the labelsused for representing the topology layers in the user interface 150,2150, 4150 were “Backbone”, “LAN”, “Computer”, “SAN” and “Storage”.However, when the logical components are applied to this invention fordisplay in a topographical representation, those labels, which is the“class” of the topology layer, are different from those described abovein the first through third embodiments. Thus, the fourth embodimentsdescribe examples of various topologies that include logical componentsas part of the IT system, and that show the respective class labels usedin those examples.

FIG. 24A illustrates an exemplary topology of a web three-tiered system5100. The system is composed as having three tiers of server programs,which are “Web Server”, “Application Server” and “Database Server”.These tiers are displayed as the label name of their respective columnson the topological list view as web server column 5110, applicationserver column 5120 and database server column 5130. In the web servercolumn 5110, each web server icons 5140 are listed as representing eachserver functioning as a web server in the information system. The icon5140 of this type, as with computer node icons 140, and may be of aheight corresponding to a single row height, and thus, may be alignedone per row. On the application server column 5120, as similarly,application server icons 5150 are listed as representing the applicationservers in the information system. The icons 5150 of this type may alsobe of a height corresponding to a single row height, and may also bealigned one per row as well. Similarly, database server icons 5160 arelisted in the database server column 5130 of the user interface 5100 forrepresenting servers in the system acting as database servers, and areof a similar height and alignment. Connection lines are drawn betweenthe web server icons and particular related application server icons,which represent the logical associations between the web serverinstances and the application server instances in that the respectiveicons represent in the information system. Similarly, connection linesare drawing between the application server icons 5120 and the databaseserver icons 5160 representing database server instances that are beingused by particular application server instances.

FIG. 24B illustrates an exemplary topology representation in a userinterface 5200 for an information system that has a plurality of virtualmachines and connected to storages through a SAN. For example, such aninformation system may be similar to the information system described inthe prior embodiments, such as with respect to FIG. 3, but also includesvirtual machines as components belonging to hypervisors instead of thephysical “computer nodes” described in the embodiments above. Forexample, VMware Inc. of Palo Alto, Calif. provides virtual machinesoftware. Thus, the computer column 413 may be replaced with a virtualmachine column 5210 and a hypervisor column 5220. SAN column 414 andstorage column 415 shown in this embodiment are similar to the previousembodiments. On the virtual machine column 5210, respective virtualmachines icons 5250 are listed, each having a height corresponding to asingle row height, similar to the “computer” or “server” icons shown inthe prior embodiments. In the hypervisor column 5220, hypervisor icons5260, are displayed, which represent hypervisors in the informationsystem that run virtual machines in the information system. Virtualmachine icons 5250 are listed for each virtual machine instance in theinformation system, and connection lines are drawn based on thedependency between the virtual machines and their respectivehypervisors. Since a hypervisor is able to run a plurality of virtualmachines, each hypervisor object icon 5260 has a row heightcorresponding to the number of connected virtual machines. Thushypervisor icon 5260-1 has a height corresponding to two rows inaccordance with having two related virtual machines 5250-1 and 5250-2,while hypervisor icon 5260-2 has a height corresponding to only one rowheight, as only one virtual machine icon 5250-3 is connected thereto.SAN column 414 for the SAN layer and storage column 415 for the storagelayer may be the same as described in prior embodiments. From thehypervisor icons 5260, connection lines are drawn to the SAN icon 450,representing the particular SAN instance to which the respectivehypervisor instances are connected in the information system.

FIG. 24C illustrates an exemplary topology representation in a userinterface 5300, for an information system that has database instancesand logical volumes that have been constructed, such as by a logicalvolume manager, from underlying RAID groups, which in turn are composedfrom HDDs in the information system. The topology display may include aHDD column 5340, in which respective HDD icons 5380-1 through 5380-8 arelisted, each having an icon height corresponding to a single row height.A RAID group column 5330 lists RAID group icons 5370 corresponding toRAID groups created on the HDDs of the information system. Connectionlines connect the RAID group icons to the respective HDD icons 5380 ofthe HDDs that make up the respective RAID groups in the informationsystem. The row height of each RAID group icon 5370 corresponds to thenumber of HDD icons connected thereto, and the HDD icons are aligned byrow with their respective RAID group icon 5370. A logical volume column5320 contains logical volume icons 5360 that are constructed from eachRAID group in the information system. Each logical volume icon 5360 isconnected to the specific RAID group icon 5370 that provides thecapacity for it. In addition, database icons 5350 are listed in adatabase column 5310, and shown as being connected to the logical volumeicons 5360, to represent which database instances in the informationsystem are using which particular logical volumes in the informationsystem. The row height of each database icon 5350 may correspond to thenumber of volume icons connected thereto.

Thus, as illustrated by the above embodiments, both hardware componentsand logical components of an information system can be separated by typeor class. Connection data can be collected and sorted to determineconnections between objects of different classes. Columns representingeach class of object to be represented in a system topology can begenerated in the user interface with a variable number of rows forcontaining a variable number objects of each class listed according tothe predetermined columns. The icons representing objects in each classare laid out in accordance with the end-to-end connection data, asdescribed above, and the layout is optimized to attempt align icons forconnected objects on or near the same row. Then connection lines aredrawn to represent connections or associations within the informationsystem. Thus, system topology for any number of hardware and/or logicalcomponents of an information system may be represented using the denseuser interface of the invention.

Accordingly, it will be apparent that embodiments of the inventionprovide an efficient method to improve density of displaying topologicalrelationships of many management target objects in a user interface,while still enabling a user to easily comprehend the associationsbetween the various objects in the management target information system.Embodiments of the invention provide a system topology that is laid outaccording to a lattice of a predefined number of columns and a pluralityof rows that may be increased or decreased depending on the number ofcomponents to be displayed so as to create a list-like or matrix-likegraphical viewing format which simultaneously achieves both high densityand clearly classified topology. Thus, icons representing objects of thesame system layer are aligned according to their predetermined columns,and further, icons that are connected to each other across the systemlayers are aligned in the same row(s) when possible. Further, while anexemplary embodiments of a user interface have been described andillustrated as having predefined vertical columns and a variable numberof horizontal rows, it will be appreciated by those skilled in the artthat the arrangement could be rotated 90 degrees or flipped sideways inother embodiments, so that the predefined columns run horizontally andthe variable rows run vertically. Other variations will also be apparentin light of the disclosure herein.

Additionally, those skilled in the art will appreciate that theforegoing described exemplary embodiments can be implemented using, forexample, various types of computer systems. Graphical user interfacesaccording to the present invention can, for example, be used inconjunction with a management computer such as that illustrated in FIGS.1 and 2. Of course, the computer illustrated in FIGS. 1 and 2 is purelyexemplary of one type of computer system in which user interfacespresenting topological views according to the present invention may beimplemented. The computer system can also have known I/O devices (e.g.,CD and DVD drives, floppy disk drives, hard drives, etc.) which canstore and read the modules, programs and data structures used toimplement the above-described invention. These modules, programs anddata structures can be encoded on such computer-readable media. Forexample, the data structures of the invention can be stored oncomputer-readable media independently of one or more computer-readablemedia on which reside the topology presentation module and/or the othermodules used in the invention.

From the foregoing, it will be apparent that embodiments of theinvention provide methods and apparatuses for generating and displayinga user interface providing a representation of system topology in amanner that combines graphic representation with list view advantages.Embodiments of the user interface of the invention improve systemavailability and performance management operations. Additionally, whilespecific embodiments have been illustrated and described in thisspecification, those of ordinary skill in the art appreciate that anyarrangement that is calculated to achieve the same purpose may besubstituted for the specific embodiments disclosed. This disclosure isintended to cover any and all adaptations or variations of the presentinvention, and it is to be understood that the above description hasbeen made in an illustrative fashion, and not a restrictive one.Accordingly, the scope of the invention should properly be determinedwith reference to the appended claims, along with the full range ofequivalents to which such claims are entitled.

What is claimed is:
 1. A computer system comprising: a user interface; amemory being configured to store topology information regarding atopology of an information system, the information system including aplurality of networks, each of which is configured by a plurality ofswitches, and a plurality of storage systems; and a processor beingconfigured to: select a first storage system from the plurality ofstorage systems using the topology information stored in the memory;control to display, in the user interface, a first storage iconcorresponding to the first storage system; select a first network fromthe plurality of networks and a plurality of first switches, whichconfigure the first network of the plurality of networks, from theplurality of switches by referring the topology information stored inthe memory, control to display, in the user interface, a first networkicon corresponding to the first network, the first network iconcontaining a plurality of first switch icons corresponding to theplurality of first switches; and control to display, in the userinterface, a connection line which connects the first storage icon andthe first network icon in case that the plurality of first switches arecoupled to the first storage system in the topology information storedin the memory.
 2. A computer system according to claim 1, wherein theprocessor is further configured to manage a plurality of columns in theuser interface, the plurality of columns including a network column inwhich the first network icon is displayed and a storage column in whichthe first storage icon is displayed.
 3. A computer system according toclaim 1, wherein the processor is further configured to manage aplurality of rows in the user interface, the plurality of rows includinga first row in which the first network icon and the first storage iconare displayed.
 4. A computer system according to claim 1, wherein theprocessor is further configured to: manage a lattice, in the userinterface, comprised by a plurality of columns and a plurality of rows;control to display the first network icon in a network column of theplurality of the columns and a first row of the plurality of rows; andcontrol to display the first storage icon in a storage column of theplurality of the columns and the first row.
 5. A computer systemaccording to claim 1, wherein the first network is a storage areanetwork and the plurality of first switches are a plurality of IPswitches configuring the storage area network.
 6. A computer systemcomprising: a user interface; a memory being configured to storetopology information regarding a topology of an information system, theinformation system including a plurality of networks, each of which isconfigured by a plurality of switches, and a plurality of servers; and aprocessor being configured to: select a first server from the pluralityof servers using the topology information stored in the memory; controlto display, in the user interface, a first server icon corresponding tothe first server; select a first network from the plurality of networksand a plurality of first switches, which configure the first network ofthe plurality of networks, from the plurality of switches by referringthe topology information stored in the memory, control to display, inthe user interface, a first network icon corresponding to the firstnetwork, the first network icon containing a plurality of first switchicons corresponding to the plurality of first switches; and control todisplay, in the user interface, a connection line which connects thefirst server icon and the first network icon in case that the pluralityof first switches are coupled to the first server in the topologyinformation stored in the memory.
 7. A computer system according toclaim 1, wherein the processor is further configured to manage aplurality of columns in the user interface, the plurality of columnsincluding a network column in which the first network icon is displayedand a server column in which the first server icon is displayed.
 8. Acomputer system according to claim 1, wherein the processor is furtherconfigured to manage a plurality of rows in the user interface, theplurality of rows including a first row in which the first network iconand the first server icon are displayed.
 9. A computer system accordingto claim 1, wherein the processor is further configured to: manage alattice, in the user interface, comprised by a plurality of columns anda plurality of rows; control to display the first network icon in anetwork column of the plurality of the columns and a first row of theplurality of rows; and control to display the first server icon in aserver column of the plurality of the columns and the first row.
 10. Acomputer system according to claim 1, wherein the first network is astorage area network or a local area network, and the plurality of firstswitches are a plurality of IP switches or a plurality of FC switchesconfiguring the storage area network or the local area network.
 11. Acomputer system comprising: a user interface; a memory being configuredto store topology information regarding a topology of an informationsystem, the information system including a plurality of networks, eachof which is configured by a plurality of switches, and a plurality ofvirtual machines; and a processor being configured to: select a firstvirtual machine from the plurality of virtual machines using thetopology information stored in the memory; control to display, in theuser interface, a first virtual machine icon corresponding to the firstvirtual machine; select a first network from the plurality of networksand a plurality of first switches, which configure the first network ofthe plurality of networks, from the plurality of switches by referringthe topology information stored in the memory, control to display, inthe user interface, a first network icon corresponding to the firstnetwork, the first network icon containing a plurality of first switchicons corresponding to the plurality of first switches; and control todisplay, in the user interface, a connection line which connects thefirst virtual machine icon and the first network icon in case that theplurality of first switches are coupled to the first virtual machine inthe topology information stored in the memory.
 12. A computer systemaccording to claim 1, wherein the processor is further configured tomanage a plurality of columns in the user interface, the plurality ofcolumns including a network column in which the first network icon isdisplayed and a server column in which the first virtual machine icon isdisplayed.
 13. A computer system according to claim 1, wherein theprocessor is further configured to manage a plurality of rows in theuser interface, the plurality of rows including a first row in which thefirst network icon and the first virtual machine icon are displayed. 14.A computer system according to claim 1, wherein the processor is furtherconfigured to: manage a lattice, in the user interface, comprised by aplurality of columns and a plurality of rows; control to display thefirst network icon in a network column of the plurality of the columnsand a first row of the plurality of rows; and control to display thefirst virtual machine icon in a server column of the plurality of thecolumns and the first row.
 15. A computer system according to claim 1,wherein the first network is a storage area network or a local areanetwork, and the plurality of first switches are a plurality of IPswitches or a plurality of FC switches configuring the storage areanetwork or the local area network.
 16. A computer system comprising: amemory being configured to store information regarding a topology of aninformation system, the information system including a plurality ofnetworks, each of which is configured by a plurality of switches, and aplurality of storage systems; and a processor being configured to:control to display a first storage icon corresponding to a first storagesystem of the plurality of storage systems; control to display a firstnetwork icon corresponding to a first network of the plurality ofnetworks, the first network icon containing a plurality of first switchicons corresponding to a plurality of first switches of the plurality ofswitches, wherein the first network is configured by the plurality offirst switches in the topology of the information system; and control todisplay, if the plurality of first switches are coupled to the firststorage system in the topology of the information system, a connectionline which connects the first storage icon and the first network iconinstead of the plurality of first switch icons.
 17. A computer systemaccording to claim 16, wherein the processor is further configured tomanage a plurality of columns in the user interface, the plurality ofcolumns including a network column in which the first network icon isdisplayed and a storage column in which the first storage icon isdisplayed.
 18. A computer system according to claim 16, wherein theprocessor is further configured to manage a plurality of rows in theuser interface, the plurality of rows including a first row in which thefirst network icon and the first storage icon are displayed.
 19. Acomputer system according to claim 16, wherein the processor is furtherconfigured to: manage a lattice, in the user interface, comprised by aplurality of columns and a plurality of rows; control to display thefirst network icon in a network column of the plurality of the columnsand a first row of the plurality of rows; and control to display thefirst storage icon in a storage column of the plurality of the columnsand the first row.
 20. A computer system according to claim 16, whereinthe first network is a storage area network and the plurality of firstswitches are a plurality of IP switches configuring the storage areanetwork.
 21. A computer system comprising: a memory configured to storeinformation regarding a topology of an information system, theinformation system including a plurality of networks, each of which isconfigured by a plurality of switches, and a plurality of servers; and aprocessor being configured to: control to display a first server iconcorresponding to a first server of the plurality of servers; control todisplay a first network icon corresponding to a first network of theplurality of networks, the first network icon containing a plurality offirst switch icons corresponding to a plurality of first switches of theplurality of switches, wherein the first network is configured by theplurality of first switches in the topology of the information system;and control to display, if one of the first switches is coupled to thefirst server in the topology of the information system, a connectionline which connects the first server icon and the first network iconinstead of the one of the first switches.
 22. A computer systemaccording to claim 21, wherein the processor is further configured tomanage a plurality of columns in the user interface, the plurality ofcolumns including a network column in which the first network icon isdisplayed and a server column in which the first server icon isdisplayed.
 23. A computer system according to claim 21, wherein theprocessor is further configured to manage a plurality of rows in theuser interface, the plurality of rows including a first row in which thefirst network icon and the first server icon are displayed.
 24. Acomputer system according to claim 21, wherein the processor is furtherconfigured to: manage a lattice, in the user interface, comprised by aplurality of columns and a plurality of rows; control to display thefirst network icon in a network column of the plurality of the columnsand a first row of the plurality of rows; and control to display thefirst server icon in a server column of the plurality of the columns andthe first row.
 25. A computer system according to claim 21, wherein thefirst network is a storage area network or a local area network, and theplurality of first switches are a plurality of IP switches or aplurality of FC switches configuring the storage area network or thelocal area network.
 26. A computer system comprising: a memoryconfigured to store information regarding a topology of an informationsystem, the information system including a plurality of networks, eachof which is configured by a plurality of switches, and a plurality ofvirtual machines; and a processor being configured to: control todisplay a first server icon corresponding to a first virtual machine ofthe plurality of virtual machines; control to display a first networkicon corresponding to a first network of the plurality of networks, thefirst network icon containing a plurality of first switch iconscorresponding to a plurality of first switches of the plurality ofswitches, wherein the first network is configured by the plurality offirst switches in the topology of the information system; and control todisplay, if one of the first switches is coupled to the first virtualmachine in the topology of the information system, a connection linewhich connects the first server icon and the first network icon insteadof the one of the first switches.
 27. A computer system according toclaim 26, wherein the processor is further configured to manage aplurality of columns in the user interface, the plurality of columnsincluding a network column in which the first network icon is displayedand a server column in which the first virtual machine icon isdisplayed.
 28. A computer system according to claim 26, wherein theprocessor is further configured to manage a plurality of rows in theuser interface, the plurality of rows including a first row in which thefirst network icon and the first virtual machine icon are displayed. 29.A computer system according to claim 26, wherein the processor isfurther configured to: manage a lattice, in the user interface,comprised by a plurality of columns and a plurality of rows; control todisplay the first network icon in a network column of the plurality ofthe columns and a first row of the plurality of rows; and control todisplay the first virtual machine icon in a server column of theplurality of the columns and the first row.
 30. A computer systemaccording to claim 26, wherein the first network is a storage areanetwork or a local area network, and the plurality of first switches area plurality of IP switches or a plurality of FC switches configuring thestorage area network or the local area network.